Added ability to upload page images and modified existing uploads

DJFileUpload
	Validation was failing, so added new extension javascript validation to enfore file upload restrictions
	Added ability to style the upload button by passing in a style
Manage Files MySobekViewer
	Now, exclude page images
	Updated look and feel
Added new Page Image Upload mySobekViewer for uploading new page images
QC Viewer
	New button added to upload new page images
	Added hover-overs to the images in the toolbar